Transcription of Tolerance Stack Analysis Methods
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Tolerance Stack Analysis Methods Fritz Scholz . Research and Technology Boeing Information & Support Services December 1995. Abstract The purpose of this report is to describe various Tolerance stacking Methods without going into the theoretical details and derivations behind them. For those the reader is referred to Scholz (1995). For each method we present the assumptions and then give the Tolerance stacking formulas. This will allow the user to make an informed choice among the many available Methods . The Methods covered are: worst case or arithmetic tolerancing, simple statistical tolerancing or the RSS method, RSS Methods with in ation factors which account for nonnormal distributions, toleranc- ing with mean shifts, where the latter are stacked arithmetically or statistically in di erent ways, depending on how one views the trade- o between part to part variation and mean shifts.
Tolerance stack analysis methods are described in various books and pa-pers, see for example Gilson (1951), Mansoor (1963), Fortini (1967), Wade ... tolerancing method one has tried to relax these distributional assumptions inavarietyofways. Asaconsequence such assumptionsaremorelikely to bemetinpractice. ...
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